"You're balancing the analytical side of your brain, which is telling you where to go and how to go there, with the other side of your brain, which is saying, 'Feel everything you're singing, and show it on your face. Feel everything exactly as you felt it when you wrote the song'," Swift told The Sunday Times magazine.

Asked how she felt knowing Styles was watching the performance in the audience, she replied: "Well, it's not hard to access that emotion when the person the song is directed at is standing by the side of the stage watching."

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Taylor Swift dated Joe Jonas back in 2008, before Jonas reportedly dumped Swift over the phone. Swift later wrote 'Forever and Always' about their failed relationship.
Copyright: Rex Features c.W.Disney/Everett/Rex Features
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